The fixtures are made of 6061 marine grade solid billet aluminum, the Y adapter is made of thick marine grade brass. The Y-KNOT Triple Typhon has 3600 lumens! You want to light up a wake? This is your choice! Great for wakeboard boats. The LED's shine directly onto each side of your wake giving you a one of kind look! The center LED lights up your prop wash! Simply just an amazing addition to our product line! 5.25" at its widest point. Protrudes 3" Lights can be removed to install it, if space is an issue. You can easily use one light as a drain. Take one light loose, drain the bilge, done.